fix: simplify redundant projector_type checks inside domino branch

Inside `if self.projector_type == "domino":`, two nested checks
always evaluated to True/constant. Replace with the simplified values.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Orestis Zambounis <orestis.zambounis@gmail.com>

Author: orestis-z

src/speculators/models/dflash/core.py

@@ -509,11 +509,7 @@ def forward(
             hidden_4d = hidden.reshape(1, num_anchors, self.block_size, -1)
             base_logits_4d = logits.reshape(1, num_anchors, self.block_size, -1)
 
-            suffix_start = (
-                self.config.pure_draft_prefix_len
-                if self.config.projector_type == "domino"
-                else 1 + self.config.pure_draft_prefix_len
-            )
+            suffix_start = self.config.pure_draft_prefix_len
 
             prev_token_ids = input_ids[:, anchored_block_indices]
             prev_token_ids_4d = prev_token_ids.reshape(1, num_anchors, self.block_size)
@@ -541,7 +537,7 @@ def forward(
             else:
                 base_mask = domino_loss_mask
 
-            domino_decay = "domino" if self.config.projector_type == "domino" else "dflash"
+            domino_decay = "domino"
             base_loss, base_metrics = compute_metrics(
                 logits,
                 targets,